Bug Identifier
Plaster Bagworm
Community identification

Plaster Bagworm

Phereoeca uterella

Order & Family
Lepidoptera: Tineidae
Size
Case length is typically 8 mm to 14 mm (0.3 to 0.5 inches).
See this bug in the Encyclopedia

Natural Habitat

Widely found inside homes, garages, and sheds, especially in warm, humid climates; they are often seen on walls, ceilings, and under furniture.

Diet & Feeding

The larvae feed on spiderwebs, wool, silk, hair, and various household detritus.

Behavior Patterns

The larva constructs a protective silk case covered in sand, dust, and lint, which is wider in the middle than at the ends; both ends of the case are open, allowing the larva to move in either direction. It undergoes complete metamorphosis, eventually emerging from the case as a small moth.

Risks & Benefits

They are considered minor household pests because they can damage natural fibers like wool and silk. They pose no direct health risk to humans or pets but may occasionally consume beneficial spiderwebs.